<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Throttle</title>
</head>
<body>
    <h1>节流</h1>
    <div id='panel' style="background:red;width:200px;height:200px"></div>
    <script src="./throttle.js"></script>
</body>
</html>